Definition of infernal adjective from the Oxford Advanced American Dictionary

     

    infernal

     adjective
    adjective
    NAmE//ɪnˈfərnl//
     
     
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  1. 1[only before noun] (old-fashioned) extremely annoying Stop that infernal noise!
  2. 2(literary) connected with hell the infernal regions
NAmE//ɪnˈfərnəli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: infernal